tag:blogger.com,1999:blog-34524946.post4670780372665834969..comments2023-10-30T03:58:56.784-04:00Comments on from Archaea to Zeaxanthol: Weekly Urchin: Sea Urchin 101Jim Lemirehttp://www.blogger.com/profile/14000051293978203511noreply@blogger.comBlogger4125tag:blogger.com,1999:blog-34524946.post-90654143733995037232008-11-15T23:20:00.000-05:002008-11-15T23:20:00.000-05:00thx, man, im doin a powerpoint presentation for my...thx, man, im doin a powerpoint presentation for my marine science class, and i chose sea urchins in general the post came in handyAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-34524946.post-61857722573404783612008-06-27T11:01:00.000-04:002008-06-27T11:01:00.000-04:00Jane -The bands are not visible in live urchins - ...Jane -<BR/><BR/>The bands are not visible in live urchins - the plates/test is covered by a thin layer of epidermis tissue in living urchins. The only way to see the bands is with a cleaned test, free of all the overlaying spines and tissue. Thus, the urchin must be dead.<BR/><BR/>Also, I would be careful about calling the bands annual - they are probably more irregular than that - indicating periods of growth vs. periods of no growth.Jim Lemirehttps://www.blogger.com/profile/14000051293978203511noreply@blogger.comtag:blogger.com,1999:blog-34524946.post-65312435971386002642008-06-27T07:05:00.000-04:002008-06-27T07:05:00.000-04:00Hi - interesting and fascinating. Thanks. Have you...Hi - interesting and fascinating. Thanks. Have you any information on annual bands on the interambulacral plates of sea urchins? Can they be seen/counted on living urchins?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-34524946.post-92190184134119089352008-02-08T04:18:00.000-05:002008-02-08T04:18:00.000-05:00Cool. "Non-evil?" Not so sure. But cool.Cool. "Non-evil?" Not so sure. But cool.Stephen Mathesonhttps://www.blogger.com/profile/05057004085073574659noreply@blogger.com